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磷素是棉花的重要营养元素之一。它对促进棉花的生长发育,提高产量和改善品质都有重要作用。我省棉田,特别是盐碱地棉田,土壤肥力较低,既缺氮又缺磷,而土壤有效磷含量较低。近年来,随着农业生产条件的改善和化肥工业的发展,棉田氮肥施用量也渐提高,盐碱地棉田氮磷比例失调现象,日益引起人们的重视。我们于1981—1984年在豫东北盐碱地棉区进行了施用磷肥对棉花生长发育和产量影响的试验,并探讨了磷肥对棉花的增产效应及其经济效益,现将试验
Phosphorus is one of the important nutrition elements of cotton. It plays an important role in promoting the growth and development of cotton, increasing yield and improving quality. Cotton fields in our province, especially in saline-alkali soils, have lower soil fertility and are both deficient in nitrogen and deficient in phosphorus while their available phosphorus content is relatively low. In recent years, with the improvement of agricultural production conditions and the development of chemical fertilizer industry, the amount of nitrogen fertilizer in cotton fields has also been gradually increasing. The imbalance of nitrogen and phosphorus in cotton fields has drawn more and more attention. In 1981-1984, we conducted experiments on the effect of applying phosphate fertilizer on the growth and yield of cotton in the saline-alkali cotton region of northeast Henan Province and discussed the yield-increasing effect and economic benefits of phosphorus fertilizer on cotton. Now we test